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Просмотр по автору "Santangelo A."

Просмотр по автору "Santangelo A."

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  • A non-pulsating neutron star in the supernova remnant HESS J1731-347/G353.6-0.7 with a carbon atmosphere 
    Klochkov D.; Pühlhofer G.; Suleimanov V.; Simon S.; Werner K.; Santangelo A. (2013)
    Context. The central compact object (CCO) candidate in the center of the supernova remnant shell HESS J1731-347/G353.6-0.7 shows no pulsations and exhibits a blackbody-like X-ray spectrum. If the absence of pulsations is ...
  • An observational argument against accretion in magnetars 
    Doroshenko V.; Santangelo A.; Suleimanov V.F.; Tsygankov S.S. (2020)
    © ESO 2020. The phenomenology of anomalous X-ray pulsars is usually interpreted within the paradigm of very highly magnetized neutron stars, also known as magnetars. According to this paradigm, the persistent emission of ...
  • BeppoSAX observations of GRO J1744-28: Cyclotron line detection and the softening of the burst spectra 
    Doroshenko R.; Santangelo A.; Doroshenko V.; Suleimanov V.; Piraino S. (2015)
    © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We present an analysis of BeppoSAX observations of the unique transient bursting X-ray pulsar GRO J1744-28. The observations ...
  • Evidence for a binary origin of a central compact object 
    Doroshenko V.; Pühlhofer G.; Kavanagh P.; Santangelo A.; Suleimanov V.; Klochkov D. (2016)
    © 2016 The Authors.Central compact objects (CCOs) are thought to be young thermally emitting isolated neutron stars that were born during the preceding core-collapse supernova explosion. Here, we present evidence that at ...
  • Infrared and X-ray study of the Galactic SNR G15.9+0.2 
    Sasaki M.; Mäkelä M.; Klochkov D.; Santangelo A.; Suleimanov V. (2018)
    © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. G15.9+0.2 is a Galactic shell-type supernova remnant (SNR), which was detected in radio and has been confirmed in X-rays ...
  • Is there a highly magnetized neutron star in GX 301-2? 
    Doroshenko V.; Santangelo A.; Suleimanov V.; Kreykenbohm I.; Staubert R.; Ferrigno C.; Klochkov D. (2010)
    We present the results of an in-depth study of the long-period X-ray pulsar GX 301-2. Using archival data of INTEGRAL, RXTE ASM, and CGRO BATSE, we study the spectral and timing properties of the source. Comparison of our ...
  • Observations of GRO J1744-28 in quiescence with XMM-Newton 
    Doroshenko V.; Suleimanov V.; Tsygankov S.; Mönkkönen J.; Ji L.; Santangelo A. (2020)
    © ESO 2020. We report on the deep observations of the "bursting pulsar"GRO J1744-28, which were performed with XMM-Newton and aimed to clarify the origin of its X-ray emission in quiescence. We detect the source at a ...
  • RT Crucis: A look into the X-ray emission of a peculiar symbiotic star 
    Ducci L.; Doroshenko V.; Suleimanov V.; Nikołajuk M.; Santangelo A.; Ferrigno C. (2016)
    © 2016 ESO.Symbiotic stars are a heterogeneous class of interacting binaries. Among them, RT Cru has been classified as prototype of a subclass that is characterised by hard X-ray spectra that extend past ∼20 keV. We analyse ...
  • Spectral and timing analysis of the bursting pulsar GRO J1744-28 with RXTE observations 
    Ji L.; Santangelo A.; Zhang S.; Doroshenko V.; Suleimanov V.; Ducci L.; Kretschmar P.; Doroshenko R. (2019)
    © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We analysed RXTE/PCA observations of the bursting pulsar GRO J1744-28 during its two outbursts in 1995-1997. We have ...
  • Switches between accretion structures during flares in 4U 1901+03 
    Ji L.; Ducci L.; Santangelo A.; Zhang S.; Suleimanov V.; Tsygankov S.; Doroshenko V.; Nabizadeh A.; Zhang S.N.; Ge M.Y.; Tao L.; Bu Q.C.; Qu J.L.; Lu F.J.; Chen L.; Song L.M.; Li T.P.; Xu Y.P.; Cao X.L.; Chen Y.; Liu C.Z.; Cai C.; Chang Z.; Chen G.; Chen T.X.; Chen Y.B.; Chen Y.P.; Cui W.; Cui W.W.; Deng J.K.; Dong Y.W.; Du Y.Y.; Fu M.X.; Gao G.H.; Gao H.; Gao M.; Gu Y.D.; Guan J.; Guo C.C.; Han D.W.; Huang Y.; Huo J.; Jia S.M.; Jiang L.H.; Jiang W.C.; Jin J.; Jin Y.J.; Kong L.D.; Li B.; Li C.K.; Li G.; Li M.S.; Li W.; Li X.; Li X.B.; Li X.F.; Li Y.G.; Li Z.W.; Liang X.H.; Liao J.Y.; Liu B.S.; Liu G.Q.; Liu H.X.; Liu H.W.; Liu X.J.; Liu Y.N.; Lu B.; Lu X.F.; Luo Q.; Luo T.; Ma X.; Meng B.; Nang Y.; Nie J.Y.; Ou G.; Sai N.; Shang R.C.; Song X.Y.; Sun L.; Tan Y.; Tuo Y.L.; Wang C.; Wang G.F.; Wang J.; Wang P.J.; Wang W.S.; Wang Y.S.; Wen X.Y.; Wu B.Y.; Wu B.B.; Wu M.; Xiao G.C.; Xiao S.; Xiong S.L.; Xu H.; Yang J.W.; Yang S.; Yang Y.J.; Yi Q.B. (2021)
    We report on our analysis of the 2019 outburst of the X-ray accreting pulsar 4U 1901+03 observed with Insight-HXMT and NICER. Both spectra and pulse profiles evolve significantly in the decaying phase of the outburst. ...
  • The neutron star in HESS? J1731 - 347: Central compact objects as laboratories to study the equation of state of superdense matter 
    Klochkov D.; Suleimanov V.; Pühlhofer G.; Yakovlev D.; Santangelo A.; Werner K. (2015)
    © ESO, 2014. Context. Central compact objects (CCOs) in supernova remnants are isolated thermally emitting neutron stars (NSs). They are most probably characterized by a magnetic field strength that is roughly two orders ...
  • The THESEUS space mission concept: science case, design and expected performances 
    Amati L.; O'Brien P.; Götz D.; Bozzo E.; Tenzer C.; Frontera F.; Ghirlanda G.; Labanti C.; Osborne J.; Stratta G.; Tanvir N.; Willingale R.; Attina P.; Campana R.; Castro-Tirado A.; Contini C.; Fuschino F.; Gomboc A.; Hudec R.; Orleanski P.; Renotte E.; Rodic T.; Bagoly Z.; Blain A.; Callanan P.; Covino S.; Ferrara A.; Le Floch E.; Marisaldi M.; Mereghetti S.; Rosati P.; Vacchi A.; D'Avanzo P.; Giommi P.; Piranomonte S.; Piro L.; Reglero V.; Rossi A.; Santangelo A.; Salvaterra R.; Tagliaferri G.; Vergani S.; Vinciguerra S.; Briggs M.; Campolongo E.; Ciolfi R.; Connaughton V.; Cordier B.; Morelli B.; Orlandini M.; Adami C.; Argan A.; Atteia J.; Auricchio N.; Balazs L.; Baldazzi G.; Basa S.; Basak R.; Bellutti P.; Bernardini M.; Bertuccio G.; Braga J.; Branchesi M.; Brandt S.; Brocato E.; Budtz-Jorgensen C.; Bulgarelli A.; Burderi L.; Camp J.; Capozziello S.; Caruana J.; Casella P.; Cenko B.; Chardonnet P.; Ciardi B.; Colafrancesco S.; Dainotti M.; D'Elia V.; De Martino D.; De Pasquale M.; Del Monte E.; Della Valle M.; Drago A.; Evangelista Y. (2018)
    © 2018 COSPAR THESEUS is a space mission concept aimed at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-domain astrophysics. These ...
  • Time domain astronomy with the THESEUS satellite 
    Mereghetti S.; Balman S.; Caballero-Garcia M.; Del Santo M.; Doroshenko V.; Erkut M.H.; Hanlon L.; Hoeflich P.; Markowitz A.; Osborne J.P.; Pian E.; Rivera Sandoval L.; Webb N.; Amati L.; Ambrosi E.; Beardmore A.P.; Blain A.; Bozzo E.; Burderi L.; Campana S.; Casella P.; D’Aí A.; D’Ammando F.; De Colle F.; Della Valle M.; De Martino D.; Di Salvo T.; Doyle M.; Esposito P.; Frontera F.; Gandhi P.; Ghisellini G.; Gotz D.; Grinberg V.; Guidorzi C.; Hudec R.; Iaria R.; Izzo L.; Jaisawal G.K.; Jonker P.G.; Kong A.K.H.; Krumpe M.; Kumar P.; Manousakis A.; Marino A.; Martin-Carrillo A.; Mignani R.; Miniutti G.; Mundell C.G.; Mukai K.; Nucita A.A.; O’Brien P.T.; Orlandini M.; Orio M.; Palazzi E.; Papitto A.; Pintore F.; Piranomonte S.; Porquet D.; Ricci C.; Riggio A.; Rigoselli M.; Rodriguez J.; Saha T.; Sanna A.; Santangelo A.; Saxton R.; Sidoli L.; Stiele H.; Tagliaferri G.; Tavecchio F.; Tiengo A.; Tsygankov S.; Turriziani S.; Wijnands R.; Zane S.; Zhang B. (2021)
    THESEUS is a medium size space mission of the European Space Agency, currently under evaluation for a possible launch in 2032. Its main objectives are to investigate the early Universe through the observation of gamma-ray ...
  • Witnessing the magnetospheric boundary at work in Vela X-1 
    Doroshenko V.; Santangelo A.; Suleimanov V. (2011)
    We present an analysis of the Vela X-1 "off-states" based on Suzaku observations taken in June 2008. Defined as states in which the flux suddenly decreases below the instrumental sensitivity, these "off-states" have been ...
  • X-ray reprocessing in accreting pulsar GX 301-2 observed with Insight-HXMT 
    Ji L.; Doroshenko V.; Suleimanov V.; Santangelo A.; Orlandini M.; Liu J.; Ducci L.; Zhang S.N.; Nabizadeh A.; Gavran D.; Zhang S.; Ge M.Y.; Li X.B.; Tao L.; Bu Q.C.; Qu J.L.; Lu F.J.; Chen L.; Song L.M.; Li T.P.; Xu Y.P.; Cao X.L.; Chen Y.; Liu C.Z.; Cai C.; Chang Z.; Chen T.X.; Chen Y.P.; Cui W.W.; Du Y.Y.; Gao G.H.; Gao H.; Gu Y.D.; Guan J.; Guo C.C.; Han D.W.; Huang Y.; Huo J.; Jia S.M.; Jiang W.C.; Jin J.; Kong L.D.; Li B.; Li C.K.; Li G.; Li W.; Li X.; Li X.F.; Li Z.W.; Liang X.H.; Liao J.Y.; Liu B.S.; Liu H.X.; Liu H.W.; Liu X.J.; Lu X.F.; Luo Q.; Luo T.; Ma R.C.; Ma X.; Meng B.; Nang Y.; Nie J.Y.; Ou G.; Ren X.Q.; Sai N.; Song X.Y.; Sun L.; Tan Y.; Tuo Y.L.; Wang C.; Wang L.J.; Wang P.J.; Wang W.S.; Wang Y.S.; Wen X.Y.; Wu B.Y.; Wu B.B.; Wu M.; Xiao G.C.; Xiao S.; Xiong S.L.; Yang R.J.; Yang S.; Yang Y.J.; Yi Q.B.; Yin Q.Q.; You Y.; Zhang F.; Zhang H.M.; Zhang J.; Zhang P.; Zhang W.; Zhang W.C.; Zhang Y.; Zhang Y.F.; Zhang Y.H.; Zhao H.S.; Zhao X.F. (2021)
    We investigate the absorption and emission features in observations of GX 301-2 detected with Insight-HXMT/LE in 2017-2019. At different orbital phases, we found prominent Fe Kα, Kβ, and Ni Kα lines, as well as Compton ...

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